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WO2018094287A1 - Motifs d'interférence pour éléments enroulés en spirale - Google Patents

Motifs d'interférence pour éléments enroulés en spirale Download PDF

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Publication number
WO2018094287A1
WO2018094287A1 PCT/US2017/062424 US2017062424W WO2018094287A1 WO 2018094287 A1 WO2018094287 A1 WO 2018094287A1 US 2017062424 W US2017062424 W US 2017062424W WO 2018094287 A1 WO2018094287 A1 WO 2018094287A1
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WIPO (PCT)
Prior art keywords
leaf
protrusions
membrane
active surface
line
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Ceased
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PCT/US2017/062424
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English (en)
Inventor
Kevin Roderick
Rodney Herrington
Kendall WEINGARDT
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Individual
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Individual
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Publication date
Application filed by Individual filed Critical Individual
Priority to KR1020197014046A priority Critical patent/KR102033982B1/ko
Priority to EP17872447.2A priority patent/EP3541623A4/fr
Priority to US16/071,567 priority patent/US11040311B2/en
Priority to JP2019522827A priority patent/JP6719667B2/ja
Priority to CN201780071166.4A priority patent/CN110248802A/zh
Publication of WO2018094287A1 publication Critical patent/WO2018094287A1/fr
Anticipated expiration legal-status Critical
Priority to US17/317,063 priority patent/US20210268444A1/en
Ceased legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D63/00—Apparatus in general for separation processes using semi-permeable membranes
    • B01D63/10—Spiral-wound membrane modules
    • B01D63/103—Details relating to membrane envelopes
    • B01D63/1031—Glue line or sealing patterns
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D63/00—Apparatus in general for separation processes using semi-permeable membranes
    • B01D63/10—Spiral-wound membrane modules
    • B01D63/106—Anti-Telescopic-Devices [ATD]
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D65/00—Accessories or auxiliary operations, in general, for separation processes or apparatus using semi-permeable membranes
    • B01D65/08—Prevention of membrane fouling or of concentration polarisation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B1/00—Layered products having a non-planar shape
    • B32B1/08—Tubular products
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/02—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by features of form at particular places, e.g. in edge regions
    • B32B3/08—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by features of form at particular places, e.g. in edge regions characterised by added members at particular parts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
    • B32B3/30—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by a layer formed with recesses or projections, e.g. hollows, grooves, protuberances, ribs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/14—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers
    • B32B37/16—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with all layers existing as coherent layers before laminating
    • B32B37/18—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with all layers existing as coherent layers before laminating involving the assembly of discrete sheets or panels only
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • B32B7/14—Interconnection of layers using interposed adhesives or interposed materials with bonding properties applied in spaced arrangements, e.g. in stripes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B9/00—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
    • B32B9/005—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising one layer of ceramic material, e.g. porcelain, ceramic tile
    • B32B9/007—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising one layer of ceramic material, e.g. porcelain, ceramic tile comprising carbon, e.g. graphite, composite carbon
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B9/00—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
    • B32B9/04—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising such particular substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2313/00—Details relating to membrane modules or apparatus
    • B01D2313/08—Flow guidance means within the module or the apparatus
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2313/00—Details relating to membrane modules or apparatus
    • B01D2313/14—Specific spacers
    • B01D2313/143—Specific spacers on the feed side
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2255/00—Coating on the layer surface
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2255/00—Coating on the layer surface
    • B32B2255/24—Organic non-macromolecular coating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2255/00—Coating on the layer surface
    • B32B2255/26—Polymeric coating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/726—Permeability to liquids, absorption
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2597/00—Tubular articles, e.g. hoses, pipes

Definitions

  • the subject invention relates to a permeable membrane system useful for the separation of fluid components, including spiral-wound membrane permeable membrane elements.
  • Spiral-wound membrane filtration elements consist of a laminated structure comprised of a membrane sheet sealed to or around a porous permeate spacer which creates a path for removal of the fluid passing through the membrane to a central tube, while this laminated structure is wrapped spirally around the central tube and spaced from itself with a porous feed spacer to allow axial flow of the fluid through the element. While this feed spacer is necessary to maintain open and uniform axial flow between the laminated structure, it is also a source of flow restriction and pressure drop within the axial flow channel and also presents areas of restriction of flow and contact to the membrane that contribute significantly to membrane fouling via biological growth, scale formation, and particle capture.
  • Embodiments of the present invention provide a membrane for use in a spiral wound filtration element, comprising a first leaf and a second leaf, where each leaf has an active surface with a plurality of protrusions disposed on the surface, the protrusions being shaped and disposed on the surface such that when the active surface of the first leaf is placed adjacent to the active surface of the second leaf the protrusions are in contact with each other, with the protrusions on the first leaf separated from the active surface of the second leaf by the protrusions on the second leaf; where the first leaf and the second leaf are placed with the active surfaces facing each other and separated by the protrusions.
  • the two leafs can be separate sheets of a suitable material, or can be provided by folding a single sheet, with each side of the fold providing one leaf.
  • a membrane for use in a spiral wound filtration element inherently has two edges, the feed edge and reject edge, corresponding to the edges of the membrane that will encounter feed fluid flow and eject waste fluid flow respectively.
  • Such a membrane also inherently has a width, corresponding to the dimension of the material between the feed and reject edges.
  • the protrusions comprise a plurality of line-shaped protrusions, where the line- shaped protrusions are disposed parallel to each other and separated from each other in all planar directions on the surface of the corresponding leaf; and wherein the line-shaped protrusions are disposed on the surface at an angle other than 90 degrees from the feed edge of the corresponding leaf such that the line-shaped protrusions on the first leaf contact the line-shaped protrusions on the second leaf at their intersections.
  • the line-shaped protrusions can extend across the entire width of the leaf, or can extend across less than the entire width. In some embodiments, the angle is between 40 and 85 degrees, or between 100 and 135 degrees.
  • the protrusions protrude from the surface of each leaf by at least 0.065mm but not more than 0.4mm.
  • the protrusions comprise a plurality of curved features, configured such that the curved feature on the first leaf will intersect the curved features on the second leaf at an angle other than 0 degrees when the membrane is spirally wound.
  • the line-shaped protrusions are at least 20mm long in the axial dimension (the component of the length measured parallel to the axis of the center tube when spirally wound) and the spacing between line segments is less than the length of the line segments.
  • the protrusions are disposed in a first region of the first leaf, and in a first region of the second leaf, the embodiment further comprises a plurality of flow protrusions disposed (a) on the active surface of the first leaf other than in the first region of the first leaf, (b) on the active surface of the second leaf other than in the first region of the second leaf, or (c) both, wherein the flow protrusions have a height about equal to the sum of the height of the protrusions in the first region of the first leaf and the height of the protrusions in the first region of the second leaf, and wherein flow protrusions on one leaf do not contact those on the other leaf when the element is spiral wound.
  • the line-shaped protrusions are disposed in regions proximal the feed and reject edges of the corresponding leaf, and the embodiment further comprises a plurality of flow protrusions disposed (a) on the active surface of the first leaf in regions other than those occupied by the line-shaped protrusions, (b) on the active surface of the second leaf in regions other than those occupied by the line-shaped protrusions, or (c) both, wherein the flow protrusions have a height about equal to the sum of the height of the line-shaped protrusions on the first leaf and the height of the line-shaped protrusions on the second leaf; and wherein the flow protrusions on one leaf do not contact those on the other leaf when the element is spiral wound.
  • the present invention also provides a method of making a membrane, comprising providing a first leaf and a second leaf, each having an active surface; placing a plurality of protrusions on the active surface of each leaf, the protrusions being shaped and disposed on the surface such that when the active surface of the first leaf is placed adjacent to the active surface of the second leaf the protrusions are in contact with each other with the protrusions on the first leaf separated from the active surface of the second leaf by the protrusions on the second leaf; placing the active surface of the first leaf adjacent to the active surface of the second leaf, separated by the protrusions.
  • Providing a first leaf and a second leaf can comprise providing two separate sheets, or can comprise providing a sheet separated into a first leaf and a second leaf by a fold line.
  • the present invention also provides a filtration element as those described herein, spirally wound around a center tube.
  • the present invention also provides a fluid treatment system, comprising a plurality of filtration elements as those described herein.
  • the present invention also provides a method of treating a fluid, comprising flowing the fluid through a filtration element as those described herein.
  • a membrane for use in a spiral wound filtration element comprising a sheet having an active surface, the sheet folded with the active surface inside the folded sheet, wherein the active surface has a plurality of protrusions disposed thereon, the protrusions being shaped and disposed on the surface such that the protrusions contact each other and hold apart the facing active surfaces in the folded sheet.
  • the protrusions comprise a plurality of line-shaped protrusions disposed on the active surface at an angle other than 90 degrees to the feed edge of the membrane. In some embodiments, the angle is between 40 and 85 degrees, or between 100 and 135 degrees. I n some embodiments, the protrusions protrude from the surface of the sheet by at least 0.065mm but not more than 0.4mm.
  • Figure 1 is an illustration of opposing patterns of solid lines on opposing faces of a single folded membrane leaf.
  • Figure 2 is an illustration of opposing patterns of segmented lines on opposing faces of a single folded membrane leaf.
  • Figure 3 is an illustration of a membrane leaf with half-height edge patterns deposited along the full length of the inlet and outlet edges of the leaf and full height features deposited on one half of the membrane leaf.
  • Figure 4 is a representation of membrane feed spacers that have curved lead in features on the feed end of the membrane element and that are trimmed after rolling the element.
  • Figure 5 is a representation of membrane feed spacers that have curved lead in features on the feed end of the membrane element and curved anti-telescoping device features to help avoid end blocking of the element from high solids fluids.
  • Embossing or depositing features onto the surface of the membrane sheet, or onto or into the permeate carrier sheet of a spiral-wound element to provide spacing between adjacent membrane sheets can provide several advantages as compared to feed spacer mesh including more open flow channels, lower pressure drop, reduced fouling, and the ability to produce thinner feed space than is practical using a mesh.
  • Various configurations have been disclosed by Barger et al, Bradford et al, and in PCT/US2014/018813.
  • Embodiments of the present invention provide the use of printed or otherwise deposited surface features that selectively contact one another to provide spacing between adjacent membrane sheets to create unique contact and flow patterns not achievable by deposition of isolated islands.
  • the patterns created thereby may also contain other deposited features that do not contact one another to provide additional spacing and flow direction within the spiral-wound element. Additionally, variable heights of printed or otherwise deposited features can be employed to produce different spacer geometries on different areas of the spiral-wound element.
  • a series of continuous angled parallel lines 10 are deposited on the membrane surface extending from the edge corresponding to the inlet flow of the rolled element to the edge corresponding to the outlet flow.
  • the printed lines can be between 0.065mm and 0.80mm wide and from 0.065mm to 0.40mm tall. Spacing between adjacent elements should be close enough to prevent collapse of the membrane sheet between the parallel lines during membrane rolling due to the viscosity of the adhesive used to form the envelope between the membrane sheet, the adjacent permeate carrier and the next membrane sheet. For materials in common use today, this spacing can be no more than 3mm from one line to the next, and more preferably is 2.5mm.
  • any angle between 0° and 90° or between 90° and 180° from the inlet flow edge 14 can be used to ensure feature to feature contact on the folded leaf, but angles in the ranges from 45-80° or 100-135° can be more suitable to maintain acceptable flow and pressure drop through the element.
  • the deposited patterns 10 When folded, the deposited patterns 10 will contact the opposite pattern 12 at a supplementary angle such that the deposited patterns will repeatedly cross and support each other without letting the pattern from the opposite side contact the membrane film directly.
  • the lines can be straight lines as shown, and can also be curved, sinusoidal, or otherwise shaped provided they contain no extended segments (e.g. ⁇ 10 mm) where the pattern is near 90°. Patterns that are not straight lines can be chosen for particular performance characteristics, e.g., to improve mixing or to lengthen or shorten the flow path across the membrane surface.
  • line segments 20 can be used instead of continuous lines to produce the pattern that will contact itself 22 when folded.
  • the printed pattern can be between 0.065mm and 0.80mm wide and from 0.065mm to 0.40mm tall. Spacing between adjacent elements should be close enough to prevent collapse of the membrane sheet between the parallel lines during membrane rolling due to the viscosity of the adhesive used to form the envelope between the membrane sheet, the adjacent permeate carrier and the next membrane sheet. With materials in common use today, this spacing can be no more than 3mm from one line to the next, and more preferably is 2.5mm.
  • any angle between 0° and 90° or between 90° and 180° from the inlet flow edge 24 can be used to ensure feature to feature contact on the folded leaf, but angles in the ranges from 45-80° or 100-135° can be more suitable to maintain acceptable flow and pressure drop through the element.
  • Rolling of a spiral-wound element is still inexact.
  • folded leaves within a given element are able to move as much as +/-10 mm axially to the center tube of the element due to movement of the various sheet materials and glue used in assembly.
  • minimum feature length of beyond 20 mm in the axial dimension will generally be needed to ensure contact between adjacent features in folded leaves.
  • Gaps between adjacent line segments in the axial dimension are shorter than the feature length in the axial dimension to avoid any possibility of nesting of features when folded. I n this embodiment the line segments can also be straight, curved, sinusoidal, or otherwise repetitively varying.
  • Maintaining open spacing at the inlet and outlet edges of the element while minimizing flow restriction within the flow channel can also be enhanced by combining full leaf length deposition where features meet to support each other when folded with areas of feature deposition that are not designed to interfere with adjacent features after folding.
  • the printed interference pattern 30 along the inlet 32 and outlet 34 edges can be between 0.065mm and 0.80mm wide and from 0.065mm to 0.40mm tall, and extend from 40mm to 80mm axially from the inlet and outlet edge of the membrane leaf.
  • any angle between 0° and 90° or between 90° and 180° from the inlet and outlet flow edge can be used to ensure feature to feature contact on the folded leaf, but angles in the ranges from 45-80° or 100-135° can be more suitable to maintain acceptable flow and pressure drop through the element.
  • Another pattern is deposited in the center section 30 on half of the membrane leaf and can be twice as tall as the features on the edges so that, when the leaf is folded along its center line 38, the spacing on the edges and the central area is uniform. I n general the patterns deposited at the edge are spaced more densely to support the glue line used to bond the leaves together while the central pattern are spaced more sparsely to allow less restricted flow through this portion of the element.
  • a pattern of solid line segments 30, 0.6mm wide and 93mm long is deposited extending from the inlet 32 and outlet 34 edge, at an angle of 45° relative to the edge of the membrane sheet such that it extends 66mm inward onto the leaf at a height that is one half the desired finished feed space height, in this case 0.2 mm for a 0.4 mm total feed spacing after folding.
  • Another pattern a square array of circular posts 36, 1 .2mm in diameter spaced 6.5mm from one another, is then deposited on the central area between the two 0.2 mm patterns to a height of 0.4 mm.
  • This pattern is only deposited along one-half the length of the overall leaf such that when the leaf is folded in half at the center line 38, the edge patterns contact one another to create 0.4 mm feed space at the edges while the central pattern creates the 0.4 mm spacing in the middle of the leaf.
  • curved inlet brine feed spacer features can be utilized. These features can be printed or deposited on one half of the membrane leaf along the inlet and outlet edges and only extend far enough to provide support to the area of the glue line. During rolling and gluing the element, the curved features 44 at the inlet and outlet edge create a tighter pattern where the tips 46 approach one another such that during rolling the patterns provide support to the adjacent layer as the spiral wound element is rolled. In another embodiment of the present invention shown in Fig. 5, the space between tips 46 can be reduced to zero thereby making a continuous solid line 48 that provides more complete support of the glue line during rolling operations.
  • the tighter spacing of the curved portions is removed which opens up the inlet and outlet spacing between the features to facilitate fluid flow and help avoid pressure losses at the ends of the element.
  • the flow of fluid into the brine feed spaces is normal (flow vector is parallel to the axis of the center tube) to the end of the element, and materials in the fluid stream can stack up at the end of the brine feed channels and thereby block the fluid feed channels. This fluid blockage at the feed end of the element can be mitigated by creating a fluid flow stream that is partially diverted in a flow vector that is at an angle from the centerline of the element.
  • turning vanes 60 have curved surfaces that impart a lateral flow at the end of the rolled element to help avoid end blocking of the element by sweeping solids in the fluid stream from the end face of the spiral wound element that can be entering the brine feed space channels of the spiral wound element.
  • the view of Fig.6 is shown as a flat, unrolled view of a spiral wound element. Normally, this pattern is wrapped around a center tube, but is shown in Fig. 6 to more easily describe the concept.
  • Brine feed solution 66 is normal (parallel to the axis of the center tube) as it enters the end of the spiral wound element.
  • Turning vanes 60 impart a flow pattern that is across the end of the spiral wound element thereby keeping material from accumulating on the end of the brine feed channel.
  • the printed spacers 64 As the printed spacers 64 enter the element, there is a curved inlet component 62 that maintains the brine feed solution 66 in line with the flow vector of brine feed solution 66.
  • printed spacers 64 help align the flow vector of brine feed solution 66 to be more parallel to the center line of the membrane element center tube.
  • these printed spacers 64 can have various shapes and configurations to stimulate localized vorticity and reduce concentration polarization in the brine feed spaces of the spiral wound element.
  • the features can be deposited by a variety of techniques.
  • Traditional printing techniques such as offset printing, gravure printing, and screen printing, can be suitable, although there might be thickness and geometry limitations with these deposition techniques.
  • Thicker features can be deposited by microdispensing, inkjet printing, fused deposition, photo polymer technology, hot melt polymers, or via application using an adhesive that can include roll transfer of sheet or pick-and-place of individual features.
  • the features can be comprised of any number of materials which are compatible with the separated fluid and the permeate carrier including, but not limited to, thermoplastics, reactive polymers, waxes, or resins.
  • materials that are compatible with the separated fluid but not compatible with direct deposition to the membrane sheet including, but not limited to high-temperature thermoplastics, metals, or ceramics, can be preformed, cast, or cut to the proper dimensions and adhered to the surface of the membrane sheet with an adhesive that is compatible with the membrane sheet.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Abstract

Des modes de réalisation de la présente invention concernent le dépôt d'éléments d'espacement soit sur les deux surfaces opposées d'une feuille de membrane pliée entière soit sur des parties de celle-ci en combinaison avec des caractéristiques déposées sur des parties de la même feuille pour créer des géométries d'espacement ne pouvant pas être obtenues autrement.
PCT/US2017/062424 2016-11-19 2017-11-17 Motifs d'interférence pour éléments enroulés en spirale Ceased WO2018094287A1 (fr)

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KR1020197014046A KR102033982B1 (ko) 2016-11-19 2017-11-17 나선형 권취 요소를 위한 간섭 패턴
EP17872447.2A EP3541623A4 (fr) 2016-11-19 2017-11-17 Motifs d'interférence pour éléments enroulés en spirale
US16/071,567 US11040311B2 (en) 2016-11-19 2017-11-17 Interference patterns for spiral wound elements
JP2019522827A JP6719667B2 (ja) 2016-11-19 2017-11-17 螺旋状に巻いた要素用の干渉パターン
CN201780071166.4A CN110248802A (zh) 2016-11-19 2017-11-17 螺旋卷绕元件的干扰图案
US17/317,063 US20210268444A1 (en) 2016-11-19 2021-05-11 Interference patterns for spiral-wound elements

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US201662424460P 2016-11-19 2016-11-19
US62/424,460 2016-11-19

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US16/071,567 A-371-Of-International US11040311B2 (en) 2016-11-19 2017-11-17 Interference patterns for spiral wound elements
US17/317,063 Continuation US20210268444A1 (en) 2016-11-19 2021-05-11 Interference patterns for spiral-wound elements

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JP6719667B2 (ja) 2020-07-08
US20210268444A1 (en) 2021-09-02
WO2018094288A3 (fr) 2019-08-22
KR102033982B1 (ko) 2019-10-18
JP2019535499A (ja) 2019-12-12
KR20190061087A (ko) 2019-06-04
EP3541623A4 (fr) 2020-06-24
US20190030488A1 (en) 2019-01-31
WO2018094288A2 (fr) 2018-05-24
CN110248802A (zh) 2019-09-17
US11040311B2 (en) 2021-06-22
US10471391B2 (en) 2019-11-12

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